Home / 39,985.47-59,990.15-11,906.48

Finding the Fourth Proportional to 39,985.47, 59,990.15 and 11,906.48

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Solution

The fourth proportional to 39,985.47, 59,990.15 and 11,906.48 is: 17,863.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.47 : 59,990.15 = 11,906.48 : x
  2. Step 2: Convert to fraction form
    39,985.47/59,990.15 = 11,906.48/x
  3. Step 3: Cross multiply
    39,985.47x = 59,990.15 × 11,906.48
  4. Step 4: Simplify right side
    39,985.47x = 714,271,700.91
  5. Step 5: Solve for x
    x = 714,271,700.91/39,985.47
  6. Step 6: Final answer
    x = 17,863.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.